Wahoo Run/Gym Pack
Combining all that you need to run, the run pack features the Wahoo Key and the Wahoo Fitness soft heart rate belt in a convenient bundle.
Wahoo Fitness wirelessly connects your iPhone 3G, iPhone 3GS, iPhone 4 or iPhone 4S to your favorite fitness measuring devices, including your heart rate sensor. With the Wahoo Key, your phone, your favorite playlists, the best fitness Apps and real-time activity information are all in the palm of your hand... or strapped to your arm!